not aware of any kit availible.... the reason for the need to rewire is that you will not have good voltage (ie more than 12volts) at your fuel pump. Over time wires get old and need replacing due to resistance building up in the cable causing the voltage to drop between the point of supply (battery) and the point of load (your pump). best to get some nice thick cable (5 meters will be plenty enough) as it will have less resistance to start with. your local car spares shop should be able to help you.